Rock-bit seals with asymmetric contact profiles

Details Rock-bit seals with asymmetric contact profiles Rock-bit seals with asymmetric contact profiles

E - Fixed Constructions

21

B

E21B 10/08 (2006.01)

Patent

CA 2519745

Sealing arrangements for a rotary cone rock-bit comprising a leg extending from a bit body and a cone rotatably mounted to the leg. A seal is disposed radially between the cone and the leg. A footprint defines an area of contact between the seal and the leg. Compression of the seal generates a contact pressure between the seal and the leg. An axial centerline evenly bisects the footprint into a mud side and a grease side. A contact pressure profile defines the contact pressure over the footprint, wherein the contact pressure on the mud side of the footprint is greater than the contact pressure on the grease side of the footprint.

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